19890521

素因数分解:

$7^2\times {\mathrm{89}}^1\times {\mathrm{4561}}^1$

素因数の和:4664

約数の個数: 12

約数和(自身を含む): 23403060

約数和(自身を除く): 3512539

約数列:

[1, 7, 49, 89, 623, 4361, 4561, 31927, 223489, 405929, 2841503, 19890521]

約数ペア:

[(1, 19890521), (7, 2841503), (49, 405929), (89, 223489), (623, 31927), (4361, 4561)]